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Unlocked evanescent waves in periodic structures

Autor
Botey, M.; Cheng, Y.; Romero-García, V.; Pico, R.; Herrero, R.; Sánchez, V.; Staliunas, K.
Tipus d'activitat
Article en revista
Revista
Optics letters
Data de publicació
2013-06-01
Volum
38
Número
11
Pàgina inicial
1890
Pàgina final
1892
DOI
https://doi.org/10.1364/OL.38.001890 Obrir en finestra nova
Projecte finançador
FIS2011-29731-C02-01
URL
http://dx.doi.org/10.1364/OL.38.001890 Obrir en finestra nova
Resum
We predict the existence of evanescent modes with unlocked phases in two-dimensional (2D) dielectric periodic structures. Contrary to what is known for one-dimensional structures, where evanescent fields lock to the host modulation, we show that in 2D systems a new class of evanescent modes exists with an unlocked real part of the wave vector. Hence, beams constructed from such unlocked evanescent waves can exhibit spatial effects. A significant focalization of a beam propagating within the band...
Paraules clau
(020.1670) Coherent optical effects, (260.5950) Self-focusing, Nanophotonics and photonic crystals
Grup de recerca
DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers

Participants